I picked this up recently and have really enjoyed reading it. It covers a fair bit of detail on his early educational years -- Chicago, Julliard, France with Nadia Boulanger, meeting Ravi Shankar, traveling to India, and of course the early days of the Philip Glass Ensemble, the creation and initial productions of Einstein on the Beach and Satyagraha -- all of it quite fascinating. For instance, he was still driving a taxi around Manhattan even after the early success of 'Einstein'. Also very interesting, and news to me, was how much he worked with Richard Serra...

Anyway, even if you're not a big fan of his music, there is a lot here to enjoy.